diff --git a/.travis.yml b/.travis.yml
index bde287f..ae9a2fa 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -7,6 +7,8 @@ cache:
   - ccache
   - apt
   - directories:
+    - /tmp/gsl-2.4
+    - /tmp/gsl-2.3
     - /tmp/gsl-2.2.1
     - /tmp/gsl-2.0
     - /tmp/gsl-2.1
@@ -29,6 +31,8 @@ env:
         - CCACHE_CPP2=1
         - CC="ccache clang"
     matrix:
+        - GSL=2.4
+        - GSL=2.3
         - GSL=2.2.1
         - GSL=2.1
         - GSL=2.0
@@ -50,7 +54,7 @@ before_install: ./_travis/before_install.sh
 # Add verbosity for debugging
 install:
     # this should always point to the version we build the CPAN dist with
-    - PATH=/tmp/gsl-2.2.1/bin:$PATH cpanm --installdeps --notest . &> /dev/null
+    - PATH=/tmp/gsl-4/bin:$PATH cpanm --installdeps --notest . &> /dev/null
 
 before_script:
     - ulimit -c unlimited -S       # enable core dumps
diff --git a/Build.PL b/Build.PL
index 59fc6f1..11e37b4 100644
--- a/Build.PL
+++ b/Build.PL
@@ -56,7 +56,7 @@ $ccflags .= try_cflags("-Wno-unused-variable");
 $ccflags .= try_cflags("-Wno-gnu");
 $ccflags .= try_cflags("-g");
 
-$swig_flags = "$gsl_conf->{gsl_cflags} $swig_flags";
+$swig_flags = "$gsl_conf->{gsl_cflags} $swig_flags -DGSL_DISABLE_DEPRECATED";
 
 if ( GSLBuilder::is_cygwin()  && $Config{shrpenv} =~ m{\Aenv LD_RUN_PATH=(.*)\Z} ) {
     $ldflags .= " -L$1 -lperl";
diff --git a/CREDITS b/CREDITS
index 910ee5c..a693dfb 100644
--- a/CREDITS
+++ b/CREDITS
@@ -38,5 +38,8 @@ E: ambs@cpan.org
 N: Bartosz Jakubski
 U: bjakubski
 
+N: Diab Jerius
+U: djerius
+E: djerius@cpan.org
 
 =cut
diff --git a/Changes b/Changes
index b7e3394..e00ade0 100644
--- a/Changes
+++ b/Changes
@@ -1,5 +1,7 @@
 =head1 Math::GSL Changes
 
+    - compiles against GSL 2.3 and GSL 2.4
+
     - added Math::GSL::Multiset (standard gsl API and Perl OO)
 
 =head1 v0.40 - ??? 2016
diff --git a/_travis/before_install.sh b/_travis/before_install.sh
index 9a10cde..d55bcc2 100755
--- a/_travis/before_install.sh
+++ b/_travis/before_install.sh
@@ -19,6 +19,9 @@ get_gsl () {
 }
 
 _get_master_gsl () {
+    
+    rmdir "gsl-master" && echo "removed empty gsl-master directory"
+
     if [ ! -d "gsl-master" ]; then
         git clone git://git.savannah.gnu.org/gsl.git gsl-master
         cd gsl-master
@@ -52,13 +55,26 @@ get_gsl 1.16
 get_gsl 2.0
 get_gsl 2.1
 get_gsl 2.2.1
+get_gsl 2.3
+get_gsl 2.4
 get_master_gsl
 
+GSL_CURRENT_DIR=/tmp/gsl-2.4
+
 ls -la /tmp/
-ls -la /tmp/gsl-2.2.1/bin
-cd /home/travis/build/leto/math--gsl
-LD_LIBRARY_PATH=/tmp/gsl-2.2.1/lib:$LD_LIBRARY_PATH PATH=/tmp/gsl-2.2.1/bin:$PATH perl Build.PL && ./Build && ./Build dist # create a CPAN dist with latest supported GSL release
+ls -la $GSL_CURRENT_DIR/bin
+cd $TRAVIS_BUILD_DIR
+export LD_LIBRARY_PATH=$GSL_CURRENT_DIR/lib:$LD_LIBRARY_PATH
+export PATH=$GSL_CURRENT_DIR/bin:$PATH
+
+# create a CPAN dist with latest supported GSL release
+perl Build.PL                                   \
+    && ./Build                                  \
+    && ./Build dist
+
 cp Math-GSL*.tar.gz /tmp
-ls -la /tmp/Math-GSL*.tar.gz # now we have a CPAN dist to test on each version of GSL
+
+# now we have a CPAN dist to test on each version of GSL
+ls -la /tmp/Math-GSL*.tar.gz
 cd $ORIG_DIR
 
diff --git a/inc/ver2func b/inc/ver2func
index ecac109..8052192 100644
--- a/inc/ver2func
+++ b/inc/ver2func
@@ -119,4 +119,52 @@ return {
       "2.2.1" => [qw/
         ^gsl_linalg_cholesky_decomp1$
       /],
+      "2.3" => [qw/
+      ^gsl_multifit_linear_tsvd$
+      ^gsl_multifit_linear_rank$
+      ^gsl_multifit_wlinear_tsvd$
+      ^gsl_multifit_linear_gcv_init$
+      ^gsl_multifit_linear_gcv_curve$
+      ^gsl_multifit_linear_gcv_min$
+      ^gsl_multifit_linear_gcv_calc$
+      ^gsl_multifit_linear_gcv$
+      /],
+      "2.4" => [qw/
+      ^gsl_integration_fixed_n$
+      ^gsl_integration_fixed_nodes$
+      ^gsl_integration_fixed_weights$
+      ^gsl_integration_fixed$
+      ^gsl_linalg_COD_lssolve2$
+      ^gsl_sf_hermite_prob_e$
+      ^gsl_sf_hermite_prob$
+      ^gsl_sf_hermite_prob_der_e$
+      ^gsl_sf_hermite_prob_der$
+      ^gsl_sf_hermite_phys_e$
+      ^gsl_sf_hermite_phys$
+      ^gsl_sf_hermite_phys_der_e$
+      ^gsl_sf_hermite_phys_der$
+      ^gsl_sf_hermite_func_e$
+      ^gsl_sf_hermite_func$
+      ^gsl_sf_hermite_prob_array$
+      ^gsl_sf_hermite_prob_array_der$
+      ^gsl_sf_hermite_prob_der_array$
+      ^gsl_sf_hermite_prob_series_e$
+      ^gsl_sf_hermite_prob_series$
+      ^gsl_sf_hermite_phys_array$
+      ^gsl_sf_hermite_phys_array_der$
+      ^gsl_sf_hermite_phys_der_array$
+      ^gsl_sf_hermite_phys_series_e$
+      ^gsl_sf_hermite_phys_series$
+      ^gsl_sf_hermite_func_array$
+      ^gsl_sf_hermite_func_series_e$
+      ^gsl_sf_hermite_func_series$
+      ^gsl_sf_hermite_func_der_e$
+      ^gsl_sf_hermite_func_der$
+      ^gsl_sf_hermite_prob_zero_e$
+      ^gsl_sf_hermite_prob_zero$
+      ^gsl_sf_hermite_phys_zero_e$
+      ^gsl_sf_hermite_phys_zero$
+      ^gsl_sf_hermite_func_zero_e$
+      ^gsl_sf_hermite_func_zero$
+      /],
 };
diff --git a/swig/BSpline.i b/swig/BSpline.i
index d6ac32d..6b20ba0 100644
--- a/swig/BSpline.i
+++ b/swig/BSpline.i
@@ -3,8 +3,6 @@
 %include "gsl_typemaps.i"
 %include "renames.i"
 
-#define  GSL_DISABLE_DEPRECATED 1
-
 %include "gsl/gsl_math.h"
 %include "gsl/gsl_vector.h"
 %include "gsl/gsl_bspline.h"
diff --git a/swig/Integration.i b/swig/Integration.i
index 0272059..aa02130 100644
--- a/swig/Integration.i
+++ b/swig/Integration.i
@@ -4,9 +4,16 @@
 %include "renames.i"
 
 %{
+    #ifndef GSL_VAR
+    #include "gsl/gsl_types.h"
+    #endif
+
     #include "gsl/gsl_integration.h"
     #include "gsl/gsl_math.h"
 %}
+#ifndef GSL_VAR
+%include "gsl/gsl_types.h"
+#endif
 %include "gsl/gsl_integration.h"
 %include "gsl/gsl_math.h"
 %include "../pod/Integration.pod"
diff --git a/t/Diff.t b/t/Diff.t
index a863597..c2cb59c 100644
--- a/t/Diff.t
+++ b/t/Diff.t
@@ -13,19 +13,30 @@ sub make_fixture : Test(setup) {
 sub teardown : Test(teardown) {
 }
 
-sub TEST_DIFF_CENTRAL : Tests {
+sub TEST_DIFF_CENTRAL : Tests  {
+
+    if ( !defined &{\&gsl_diff_central} ) {
+        $_[0]->builder->skip( "gsl_diff_central not found" );
+        return;
+    }
+
     my ($success, $result, $error) = gsl_diff_central(sub { return $_[0]**(1.5)}, 2.0);
     ok_similar($result, 2.1213203435, "Testing Result");
     ok_similar($error, 0.01490, "Testing Error", 0.00001);
 
-
 }
 
 sub TEST_DIFF_FORWARD : Tests {
+
+    if ( !defined &{\&gsl_diff_forward} ) {
+        $_[0]->builder->skip( "gsl_diff_forward not found" );
+        return;
+    }
+
     my ($success, $result, $error) = gsl_diff_forward(sub { return $_[0]**(1.5)}, 0.0);
     ok_similar($result, 0.0012172897, "Testing Result");
     ok_similar($error, 0.05028, "Testing Error", 0.00001);
-}   
+}